Fair-Priced Fares , how may I help you ?   How much is a round-trip ticket to London ?   When did you plan to go , sir ?   In the second week of September .   The second week of September is still in the high-season , so the cheapest tickets are $ 650 . The high season lasts until the 15th , so fares after that date are cheaper .   In that case , I'll go after the 15th . How much are the off-season fares ?   Our cheapest ticket is $ 550 on American Airlines .   Okay , I'll take it . ( to be continued ) 